Joint for panels and the like.



narran stares parlant errato;

DAVID E. HUl\l"llEB OF CAMBRIDGE, MASSACHUSETTS, ASSIGNOR. TO LIBRARY BUREAU,

OF BOSTON, MASSACHUSETTS, A CORPORATION OF NEW JERSEY.

JOINT FOR PANELS AND THE LIKE,l

Specication of Letters Patent,

Application filed February 2, 1909. Serial No. 475,548.

rammed Mar. 7, rati.

''o alt whom it may concern: l

Be 1t knownf that I, Davm E. I-IUN'rnn, a, eitizenof the United States, and resident of Cambridge, in thecounty of Middlesex and State of Massachusetts, have invented new and useful Improvements 1n Joints for I Panels and the Like, of' which the following is a specication.

My invention relates to the construction of' panels and similar adjuncts to the strucr ture of miscellaneous furniture in which may be included, for example, door panels,

windows, show cases; in short, anystructure ina which a plate or panel is inserted in and Secured to a marginal frame or rim; and the object of my invention is to facilitate and improve the construction andassemblage of articles such as above named.

In the drawings hereto annexed which illustratie embodiments of my invention;-a Fignre l isa cross sectional viewof portions of a plate and marginal frame piece which, when assembled, form a panel construction; Fig. 2 is a view in elevationand partly in section viewed from the right in Fig. l; and

Fig 3 is a cross section similar to that of Fig. l in which,t however,l an additional feat-nre is shown.

` I take for illustration a frame and panel such as might be suitable for a showcase and in which the plate portion is composed entirely of glass and the frame is preferably of metal. l

-Referringjo the drawings, B represents a portion or section of a margin-.piece or frame part and isformed with flanges B',

s B2, which constitute the two side walls of a channel; in sh-ort, the margin-piece has the characteristic form of a channel iron. The width of the channel is considerably greater than the thickness of the plate or panel A which is to be securedvto the frame. The plate A is inserted in the channel of the margin-piece, and'then a spring so proportioned that it can only enter between the plate A and the iange B of the channeled margin-piece under considerable constraint,

is t-liencompressed and crowded into theA channel between theplate A and the flange B. This, spring, represented in the drawings at C, is preferably composed of a strip or strips 'of Springsteel lnade in an undulating or zigzag form, the amplitude of thc undulations being such that the spring retaining strips will, when inserted between .the flanges of the margin-piece Iand the plate, have to he apprcciably distorted or flattened out, and'so that the inequalities of' the thickness of the plate will be compensated for by variations in the distortions of the s ring C. The form of spring shown .lin the crawings provides -a series of indiits margin or frame very securely, as when a panel is hinged at one edge, and used as a door. In order to preventsaggmgl or d1s loclgment of the plate, I insert at D, npon l.the Harige B2 an adhesive and prefeably plastiosealing strip. For instance, a coating of shellac may he applied to the inner side ofthe flange B2 before the insertion of the plate A. and then the spring retaining strips C will press the plate A firmly into the coating of' shellac which` when it hardens, will form not only an'eliective sealing strip, but a firm and 'tenaciousbinder to hold the several parts of the structure together. `When thc plate is made toadhere to the flange B by such a sealing strip, it will resist dislodgment almost as ifintcgral with the margin piecelarge square of plate glass, nsedas a door. vertically hinged on one margin, and provided onl v` with an upper horizontal margin piece keyed or otherwise firmly fastened to the' vertical hinged margin will hang without stirring from its fastenings. If for any reason, a neate'r finish is desired, a protecting strip E formed in the general shape of an angle iron may be held with its wider fiange against the plate A. the spring retainer C is then placed u-pon'the flange of the protecting strip and the protecting strip E with the springl C may then be forced together into the space between the flange B and the plate A,

' pied by the spring C.

' and sometimes as much as one-sixteenth oit au` The above described construction is, I bei here ecuharlv suited to cases where Glass x a n rplates are used. Ordinary plate glass which is sutiiciently regular in its thickne to serve all ordinary purposes for which transparency is called into requisition, is, nevertlwless, by no means -unitorni in thickness; a plate ot commercial quarter inch glass will ra ry almost always one-thirtysecond of an inch on each side of the average quarter inch thickness integrateand loosen and make more or less dirt. This is especially truewheu the structure subject to vibration. The employment ol spring pieces under considerable compression Aenables the manufacturer ot' plate glass panels to employ metal frames and ordinary plate glass, to dispense with the.v

use of cements and at the same time to produce, a structure which is durable, free from all possibility of loosening or rattling and which, especially when an adhesive sealing stripis used, is very tenaciously bound together. The facility and quickness with which panels such as above described can be assembled is obvious. g

That I claim and desire to secure by LettersPatentis:

i 1. The combination of a channeled margin piece haring opposed walls, ot an adhesive strip laid upon the inner face of one of said walls, a plate engaging the channel in Athe margin piece at its edges and bearing against the said adhesive strip and the channel wall, an in'sertible spring` member positioned on the face of the plate and held under constraint between said plate and the other wall of the channel, said spring member being freely expansible and contractible length; wise, and formed with a. number of undulat'ions adapted to contact with said plate, each undulation being capable of a limited indespring strip held under constraint in the channel between one ot the walls thereof and said plate, and a protecting strip covering -the open mouth ot the recess occupied bysaidundulated spring strip.

3. The combination of a channeled margin-piece, a plate having its edge inserted in the channelro'f the margin-piece, an angular-sectioned protecting strip lying against the plate, and an nndulated spring-strip held i under constraint in the channel, between one flange et' the protecting strip and one of the lateral walls of the channel, and concealed by the other liange of the protecting strip.

t. The combination of a channeled margin-piece, al plate having its edge inserted in the channel oit' the margin-piece, an angular-sectioned protecting strip lying against the plate, a springheld under constraint iir1 the channel, between one flange of the protecting strip and one of the lateral walls of the channel, and concealed by the other ange of the protecting strip, and a sealing strip between the plate and a'lateral Wall of the margin-piece, on thatmside of the plate away from the spring. v v

5. The combination of a channeled marginpiece, a plate having its edge inserted in the channel of the margin-piece, an angu-v lar-sectioned protectingv strip lying against the plate, a spring held under constraint in the channel, between one tlange of the protect-ing strip and one ot thelateral walls of the channel, and concealed by the other flange ot' the protecting strip, and a sealing strip of plastic adhesive material between the plate and a lateral wall of the margin-piece, on that side of the plate away from the spring. l Signed by me at Boston', `i\I'assachusetts, this thirtieth day of January 1909.

DAVID E.`IIUNTER. Witnesses:

` OD'IN Roninrrs.

`CHARLES D. livoonnnnr. 

